M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Nanoscience and Technology
NANO ENGINEERING
(CBCS 2016 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all the questions.
1. Define chirality in a CNT.
2. Name any two carcinogenic dioxins.
3. Define Stransky—Krastanov growth mechanism.
4. What type of magnetic materials are used for data
storage?
5. Define semiclassical transport theory and write its
distribution function.
6. Define interlayer coupling constant and also determine
its energy difference.
7. Define NEMS and state its performance over MEMS.
8. Write some of the applications of micro actuators.
9. Differentiate between conducting and semi conducting
polymers.
10. Define the term conjugation.
Sub. Code
533303
RW-888
2
Sp 5
Part B x 5 25)
Answer all questions, choosing either or
11. Explain in detail how CNTs are used for hydrogen
storage.
Or
Write a note on the analytical applications of CNT.
12. Write in detail the electronic structure and its
benefits in semiconducting nanostructures.
Or
Discuss in detail the Lorentz microscopy technique
and its merits and demerits.
13. Write a note on the fabrication and characterization
techniques of a magnetic tunnel junction (MTJ).
Or
Describe in detail the Landau Lifshitz Damping.
14. Discuss in detail the principle, working and
applications of magnetic sensors.
Or
Explain in detail the choice of materials and
fabrication process of MEMS.
15. Explain the properties required for exciton
formation.
Or
Describe the preparation and applications of
semiconducting polymers.
RW-888
3
Sp 5
Part C x 10 30)
Answer any three questions.
16. Define mechanical reinforcement. Explain how CNTs
assist in mechanical reinforcement of polymers?
17. Discuss in detail the materials and their properties used
for magnetic data storage.
18. Explain in detail the density of states in Cu, Ni and Co
using two current model. Also describe the corrections
applied to the model.
19. Explain in detail the extension of micro systems to
nanoscale and their component assembly and packaging.
20. Discuss in detail the influence of supramolecular order on
the electrical properties of molecular materials
——————